Rafael Nadal got his season underway with a 6-4, 6-4 loss to fellow Spaniard David Ferrer in the semi-finals of the Mudabala World Tennis Championship exhibition tournament in Abu Dhabi today.
It was the world number one's first match since losing in straight sets to Novak Djokovic in the final of the World Tour Finals in London on November 11.
Playing ahead of the official ATP season-opener in nearby Doha next week, Ferrer looked the sharper from the start, breaking in the ninth game to take the first set.
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"I think the fact that I had already played a game on the same surface meant that I was better prepared than Rafa," said Ferrer, who announced at the weekend that he was splitting with long-time coach Javier Piles in a bid to finally with a Grand Slam title.
"I am happy with the state of my game and will look to produce my best tennis for the final."
In the second semi-final world number two Djokovic defeated Jo-Wilfried Tsonga of France 7-6 (7/5), 6-3 under the watchful eyes of new coach Boris Becker.
In earlier action, Andy Murray chalked up his first win since returning to action after a three-month injury lay-off by defeating Switzerland's Wawrinka 6-3, 6-4.
The 26-year-old Wimbledon champion had back surgery in September and did not play again until he lost to Tsonga in the quarter-finals of the exhibition tournament on Thursday.